Unified STM32 Network Interface

source/portable/NetworkInterface/STM32/Fxx/STM32F767ZITX_FLASH.ld

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+/*
+******************************************************************************
+**
+** @file        : LinkerScript.ld
+**
+** @author      : Auto-generated by STM32CubeIDE
+**
+**  Abstract    : Linker script for NUCLEO-F767ZI Board embedding STM32F767ZITx Device from stm32f7 series
+**                      2048Kbytes FLASH
+**                      512Kbytes RAM
+**
+**                Set heap size, stack size and stack location according
+**                to application requirements.
+**
+**                Set memory bank area and size if external memory is used
+**
+**  Target      : STMicroelectronics STM32
+**
+**  Distribution: The file is distributed as is, without any warranty
+**                of any kind.
+**
+******************************************************************************
+** @attention
+**
+** Copyright (c) 2022 STMicroelectronics.
+** All rights reserved.
+**
+** This software is licensed under terms that can be found in the LICENSE file
+** in the root directory of this software component.
+** If no LICENSE file comes with this software, it is provided AS-IS.
+**
+******************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 8K; /* required amount of heap */
+_Min_Stack_Size = 4K; /* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+  FLASH (rx)         : ORIGIN = 0x8000000,  LENGTH = 2048K
+  RAM (xrw)          : ORIGIN = 0x20000000, LENGTH = 447K
+  RAM_NO_CACHE (rwx) : ORIGIN = 0x2006FC00, LENGTH = 65K
+}
+
+/* Sections */
+SECTIONS
+{
+  /* The startup code into "FLASH" Rom type memory */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >FLASH
+
+  /* The program code and other data into "FLASH" Rom type memory */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >FLASH
+
+  /* Constant data into "FLASH" Rom type memory */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM.extab   : {
+    . = ALIGN(4);
+    *(.ARM.extab* .gnu.linkonce.armextab.*)
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM : {
+    . = ALIGN(4);
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+    . = ALIGN(4);
+  } >FLASH
+
+  .preinit_array     :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .init_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .fini_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  /* Used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections into "RAM" Ram type memory */
+  .data :
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+    *(.RamFunc)        /* .RamFunc sections */
+    *(.RamFunc*)       /* .RamFunc* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+
+  } >RAM AT> FLASH
+
+  /* Uninitialized data section into "RAM" Ram type memory */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss section */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough "RAM" Ram  type memory left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  .EthDescriptorsBlock (NOLOAD) :
+  {
+  	. = ALIGN(1K);
+    __ETH_DESCRIPTORS_START = .;
+    *(.RxDescripSection)
+    *(.TxDescripSection)
+    . = ALIGN(1K);
+    __ETH_DESCRIPTORS_END = .;
+  } >RAM_NO_CACHE
+
+  .EthBuffersBlock (NOLOAD) :
+  {
+	  . = ALIGN(64K);
+    __ETH_BUFFERS_START = .;
+    *(.EthBuffersSection)
+    . = ALIGN(64K);
+    __ETH_BUFFERS_END = .;
+  } >RAM_NO_CACHE
+
+  /* Remove information from the compiler libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}

source/portable/NetworkInterface/STM32/Fxx/mpu.c

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+#include "main.h"
+#include "mpu.h"
+
+void MPU_Config(void)
+{
+	LL_MPU_Disable();
+
+	extern int __ETH_DESCRIPTORS_START, __ETH_BUFFERS_START;
+
+	LL_MPU_ConfigRegion(
+		LL_MPU_REGION_NUMBER0,
+		0x0,
+		( uint32_t )&__ETH_DESCRIPTORS_START,
+		LL_MPU_REGION_SIZE_1KB|LL_MPU_TEX_LEVEL0|LL_MPU_REGION_FULL_ACCESS|\
+		LL_MPU_INSTRUCTION_ACCESS_DISABLE|LL_MPU_ACCESS_NOT_SHAREABLE|LL_MPU_ACCESS_NOT_CACHEABLE|\
+		LL_MPU_ACCESS_BUFFERABLE
+	);
+	LL_MPU_EnableRegion(LL_MPU_REGION_NUMBER0);
+
+	LL_MPU_ConfigRegion(
+		LL_MPU_REGION_NUMBER1,
+		0x0,
+		( uint32_t )&__ETH_BUFFERS_START,
+		LL_MPU_REGION_SIZE_64KB|LL_MPU_TEX_LEVEL1|LL_MPU_REGION_FULL_ACCESS|\
+		LL_MPU_INSTRUCTION_ACCESS_DISABLE|LL_MPU_ACCESS_NOT_SHAREABLE|LL_MPU_ACCESS_NOT_CACHEABLE|\
+		LL_MPU_ACCESS_NOT_BUFFERABLE
+	);
+	LL_MPU_EnableRegion(LL_MPU_REGION_NUMBER1);
+
+	LL_MPU_Enable(LL_MPU_CTRL_PRIVILEGED_DEFAULT);
+}